Plzzzz help the question that are selected in the picture r not correct PLZZ help PLZZ give the answer I will mark u the brainliesst

Answer:

B

Explanation:

Generally, longer wavelengths have less energy than shorter wavelengths because the higher the frequency, the shorter the wavelength. Since radio waves have longer wavelengths than visible light, the correct answer should be B.

Answer:

a) ray horizontal and ray leaves his feet

b) The normal line respect to which the angles are measured,

c) The angle x is the reflected angle

d) virtual image,  right image

Explanation:

a) To complete the rays, you must draw a horizontal ray at the height of the man's head, this ray touches the mirror perpendicularly, therefore it bounces in the same direction.

The other ray leaves his feet and touches the mirror at one point, it is reflected with the same angle, by the law of reflection and reaches the eyes of man, the brain creates an extension of this ray and at the point of the floor creates the image point.

b) The normal line is a line perpendicular to the surface with respect to which the angles are measured,

c) The angle x is the reflected angle, which is equal to the incident angle according to the law of reflection

d) The image is formed by the prolongation of the rays of light, therefore it is a virtual image and as it has the same direction of the man it is a right image

Answer:

nuclear chemical gravitational

Answer:

i think

Explanation:

2000N-600N

net force=m.a

1400=m.3.0m/s

1400/30m/s=m

from here u divide using your calculator and i hope the answer you get is 467kg

Answer:

D. 100 J

Explanation:

Given

Mass (m) = 2 kg

Height (h) = 5 m

Acceleration due to gravity (g) = 10 m/s²

Now

Work done(W)

= m * g * h

= 2 * 10 * 5

= 100 Joule

Hope it will help :)❤

The work done in uplifting a brick having a mass of 2kg along with a height of 5m above ground level would be:

D). 100 J

Given that,

Mass of the brick [tex]= 2Kg[/tex]

Height of the brick [tex]= 5m[/tex]

As we know,

Work Done (W) [tex]= mgh[/tex]

where

m = Mass

g = Acceleration due to gravity

h = height

A.T.Q.

By substituting the given values, we get;

[tex]Work Done (W)[/tex] [tex]= 2[/tex] × [tex]10[/tex] × [tex]5[/tex]            (taking [tex]g = 10 m/s^2[/tex])

[tex]= 100 J[/tex]

Thus, the work done is 100 J and hence, option D is the correct answer.

Learn more about 'Work Done' here:

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Answer:

Velocity

Explanation:

Answer:

Explanation:

Formula

KE = 1/2 m v^3

Givens

m  = 54 kg

v = 30 m/s

Solution

KE = 1/2 54 * 30^2

KE = 1/2 54 * 900

KE = 27 * 900

KE = 24300 Joules

Answer:

c. 0.80

Explanation:

they will choose the path that has not resistance

Answer:

20V

Explanation:

V = intensity * resistance

V = 2 * 10 = 20

Answer:

S=29.298m/s

Explanation:

Use S=d/t

So, S=120m/4.1s= 29.298m/s

that means the parameter over another

Explanation:

that is when you say a parameter is inversely proportional to another it means what ever happens to the first parameter the opposite happens to the other parameter

Answer:

The definition of a light year is the distance a photon will travel in a year in a vaccume, like space.

Answer:

Electrostatics is a branch of physics that studies electric charges at rest. Since classical physics, it has been known that some materials, such as amber, attract lightweight particles after rubbing. The Greek word for amber, or electron, was thus the source of the word 'electricity'.

Answer:

A south pole of one magnet can approach the north pole of another. The magnetic fields are aligned. This makes an attractive force between the two magnets. The farther apart they are, the higher their potential energy.

Answer:

Electric frying

Explanation:

To fry food on a old broken down electric oven

Answer:

410 nanometers

Violet light is electromagnetic radiation with wavelengths of 410 nanometers and red light has a wavelength of 680 nanometers. The nanometer is a unit of distance in the metric scale and is abbreviated as nm. One nanometer (nm) equals one thousand millionths of a meter (m) or 1 nm = 10-9 m.

Explanation:

Hope it helps! Correct me if I am wrong :>

Answer:

Using my searching skills, I have came to the conclusion that the most energetic violet light wavelength is 380nm.

Answer:

The answer would be Front Line

The base line, service line, and the side lines are the part of the tennis court however front line is not a part of the tennis court. Thus, the correct option is D.

A tennis court is a 78ft long court, with a service line of 21ft from the net. The courts for singles tennis matches are 27ft wide in dimension, while the doubles matches courts are 36ft wide. The total playing area in tennis for a singles court is 2,106ft² and 2,808ft² for a doubles court.

The basic and important parts of a tennis court in both singles and doubles are the baseline, the center mark, the sidelines, the service lines, and the service boxes. The baseline is the boundary line at the ends of the tennis court, and the sidelines are the lines which mark the boundary line between in-bounds and out-of-bounds for both singles and doubles play.

Therefore, the correct option is D.

Learn more about Tennis Court here:

https://brainly.com/question/11929841

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Answer:

Homogeneous mixtures may be solids, liquids, or gases. Examples include steel, wine, and air. A homogeneous mixture is a solid, liquid, or gaseous mixture that has a uniform composition. No matter where you sample the mixture, the amount and type of components is the same.

Explanation:

Help of sciencenotes .org

Answer:

A homogeneous mixture has components evenly distributed throughout and a uniform appearance.

Salt Water

Blood

Air

Explanation:

Answer:

its either a or c im not completely sure :(

Explanation:

Answer:

i think a

Explanation:

Answer:

a = -1.2 m/s^2

Explanation:

Vi = 12 m/s

Vf = 0 m/s

t = 10 s

Plug those values into the following equation:

Vf = Vi + at

0 = 12 + 10a

---> a = -1.2 m/s^2

Answer:

description

Explanation:

Motion can be defined as a change in the location (position) of a physical object or body with respect to a reference point.

This ultimately implies that, motion would occur as a result of a change in location (position) of an object with respect to a reference point or frame of reference i.e where it was standing before the effect of an external force.

Mathematically, the motion of an object is described in terms of acceleration, time, distance, speed, velocity, displacement, position, etc.

A reference point refers to a location or physical object from which the motion (movement) of another physical object or body can be determined.

For example, a point on a map is considered to be a reference point because it represents the starting point of an object or person in motion.

If the reference point changes, the description of position changes, but the actual position does not change.

Answer:

description

Explanation:

Hope this helps

Answer: 1000 Hz · 0,5 m = 500 m/s

Explanation: speed = frequency · wavelength

Answer:

m=F/a

= 44/4

 = 11 m

Explanation:

Just use the formula F=ma

Answer:

i = 5.28 A

Explanation:

The magnetic force is given by the expression

          F = i l x B

the bold letters indicate vectors, let's write the modulus of that expression, where the direction between the conductor and the magnetic field is 90º, therefore the sine 90 = 1

           F = i l B

           i = F / l B

let's reduce the length to the SI system

           l = 10 cm (1m / 100 cm) = 0.10 m

let's calculate

           i = 12.9 / 0.1 3.6

           i = 5.28 A

Answer:

Reunirán $270.

Explanation:

Para pagar la entrada al circo y comprar palomitas Daniela y María van a cooperar con $65.50 cada una. Entonces para calcular el dinero que van a reunir entre ambas debes sumar lo que aporta cada una:

$65.50 + $65.50= $131

Por otro lado, Francisco y Javier van a cooperar con $69.50 cada uno. De igual manera, para calcular el dinero que van a reunir entre ambos debes sumar lo que aporta cada uno:

$69.50 + $69.50= $139

Para conocer el dinero total recaudado, debes sumar lo que aportan tanto ellas como ellos. Esto es:

$131 + $139= $270

Reunirán $270.